[main] Update dependencies from dotnet/xharness dotnet/xliff-tasks dotnet/arcade dotnet/linker#7907

Merged

dotnet-maestro[bot] merged 4 commits intomainfrom

darc-main-05133bd5-4f75-4e65-9af7-61e4500dc7d5

Sep 20, 2021

Commits on Sep 17, 2021

Update dependencies from https://github.com/dotnet/arcade build 20210916.4
dotnet-maestro[bot]
committed

Commits on Sep 18, 2021

Update dependencies from https://github.com/dotnet/linker build 20210917.2
dotnet-maestro[bot]
committed

Commits on Sep 20, 2021